This is the first step towards modularization and injection.  All
direct references to the GitBlit singleton within the Wicket pages
and panels have been replaced to proxy methods in the GitBlitWebApp
singleton.  There are still two Wicket classes which rely on the
GitBlit singleton; those require manual instantiation (servlet 3).

Change-Id: I0cdbbcf87959d590c446c99abb09c07c87c737bc

Change-Id: I9f91138b20219be6e3c4b28251487df262bff6cc

Change-Id: Ie0b7d1e11d634577e943c8e4dbab080b0078f1b4

This is a massive commit which reorganizes the entire project structure
(although it is still monolithic), removes the Build classes, and
switches to Moxie, a smarter Ant build tookit based on the original
Gitblit Build classes.

The Ant build script will likely require additional fine-tuning, but
this is big step forward.

TimeUtils needs to output localized strings like "5 days ago" and "6 months".  In order to do this it needs a translation resource.  Additionally, that resource can not be static because the single Gitblit server can handle multiple connections in different locales/languages.

TimeUtils has changed from a collection of static methods to some static methods and some instance methods.  A TimeUtils is instantiated with an optional resource bundle which contains the preferred translation.  If the resourec bundle is null or the requested translation key does not exist, an English  default will be used.

This change required adjusting the signatures of several key methods and that cascaded out to adjusting those methods calls in many, many  classes.

* Only list user-accessible repositories
* Syntax-highlight matched blob fragments
* Improve look and layout of search results